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concentrations with time . <br /> RECOMMENDATIONS <br /> 1 Until soil and groundwater remediation begins at the Darpetro <br /> site, it is not practical, or economically justified, to attempt <br /> any cleanup of the groundwater beneath the Morita property. When <br /> actual work begins offsite, and sufficient data is available to <br /> determine the effectiveness of that work, feasibility studies can <br /> be begun to determine the best available technology for site <br /> cleanup on this property. <br /> 2 . 'Twelve (12) sampling events over a period of over 3 years <br /> reveal that conditions beneath this site are relatively stable, <br /> and quarterly monitoring is no longer justified We recommend <br /> that measurement & sampling be put on a semi-annual schedule <br /> until a significant change in conditions warrant closer spaced <br /> data <br /> We would like periodic updates from the County EHD staff of work <br /> bung performed at the Darpetro or neighboring sites We do not <br /> have the time or staff to constantly review files to obtain <br /> current status reports, that exercise is costly and often does <br /> not produce relevant data If pertinent data has been furnished <br /> to the EHD staff, we would of course wish to review it in order <br /> to kee our client informed of offsite activities <br /> Wm nter & Associates <br /> cc * B h Thayer, RWQCB <br /> ank Morita <br /> D GE <br /> HUNTER <br /> NO 864 yt <br /> isl'q�QF CA�1E�¢�� <br /> 3 <br />